Trolley-wheel.



N0 MODEL.

No. 762,379. PATENTED JUNE 14, 1904.

J. s. BRIGGS.

TROLLEY WHEEL.

APPLICATION FILED APR. 25. 1903.

III

i JOHN SMITH BRIGGS," O LOS ANGELES CALIFORNIA FTROLLEY-WHEEL.

f SPECIEIOA-TIONi'orming part of Letters Patent No. 762,379, dated June 14, 1904.

mu ation filed Ap 1903" Be itknownthat I,JoH SMITI-LBRIGGS, a citizen of tl ieUnited States, residing at Los Angeles, in th e county of Los Angeles and State of Galifornia,-ihave invented a new and useful,.Frolley VVheel, of which the following I is a emaeama I i I Qneobject of my invention is to provide atrolley-wheelwhich will maintain contact with the wire even though the trolley-pole should oscillate, and pull ,the I ,body of the trolley- .wl e l waif item-t e wi e I ,VVh en the trolley-wire is uneven or "when the trolley;wheelfstrikes.an obstruction; on the wire, 01?. tjiio lhey;pole and wheel ,to; gether are jerked in a direction'whlich the trolley away from the. wire slightly, which might be due to sudden stoppage or uneven rate of movement of the car, the ordinary trolley-wheel breaks contact with the wire, which causes sparking or cuts off the flow of current to the motors. i 7

An object of the present invention is to provide means whereby when such unavoidable impulses are imparted to the trolley-wheel the. contact of the same withthe wire will be maintained.

Another object of my invention is to attain the foregoing with a construction which is extremely simple, strong, durable, and economical.

Another object is to provide improved means for1 attachingthe trolley-wheel to the trolleyp0 e.

The accompanying drawings" illustrate the invention, and referring thereto Figure I is a transverse sectional view taken through the center of the trolley-wheel. Fig. II is a sectional view taken on line II II, Fig.

4 I. Fig. III is a side elevation of the upper end of the trolley-pole, showing the trolleywheel attached thereto. Fig. IV is a view similar to Fig. II, showing a different construction. Fig. V is a front elevation looking at Fig. III in the direction of the arrow.

The invention comprises a circular body, the periphery of which is provided with a groove, and within the groove are means for contacting with the trolley-wire and resili- Serial No. 154,250; (No model.) I I somewhat dished, and when clamped together the two plates form a circular body with a concave groove 4:. The groove 4 1s deepened along its center and is formed in a groove 5,

' which is rectangular in cross-section. Lying within. the groove 5 is a spiral spring 6. The

spring maybe a flat spring similar to a clock:

Patented June 14, 190.4;

spring, as shown in Fig. II, or it may consist of many turns of a spring-wire 8, as shown in Fig. IV, several parallel turns fofthe same wire being made in the same pitch to form a curved row, the width of which may be about the same as the width of the spring 6. Each coil section or row may consist of several turns and the coil or row may be curved, so that a concave face is presented toward the trolley-wire 1. As shown in Fig. IV, the outer coil of rows of wire 8 may bear directly against the trolley-wire l, while in the construction shown in Fig. II inorder to give the requisite contact it may be desirable to provide an annular ring 9, the outer periphery of which is concave and the inner periphery being convex. The ring 9 is supported by the spring 6.

The space between the rows of the spring 8 is suflicient to allow of. the necessary action of the spring.

The spring 6 fits snugly within the ring 9.

1O designates the shaft of the trolley-wheel. I have provided an improved means for attaching the same to the trolley-pole 11. 12 designates a trolley-pole cap, which fits over the end of the trolley-pole 11 and which is flared, as at 13, and provided with a deep slot, which receives the ends of a pair of flat springs 14:, which are retained in place by means of without departing from the spirit of my invention.

What I claim is 1. A trolley-wheel comprising a circular body having a concave periphery, the center of the periphery having a groove, and resilient means guided by the groove and adapted to contact with the trolley-wire.

2. A trolley-wheel comprising a body composed of two symmetrical circular plates, said body having a concave periphery, the center of the periphery having a groove, and resilient means guided by the groove and adapted to contact with the trolley-wire.

3. A trolley-wheel comprising a circular body having a concave periphery theperiphery having a deeper central groove and resilient means within the groove adapted to contact with the trolley-wire.

4. A trolley-wheel comprising a body composed of two circular plates, the body having a peripheral groove, and yielding means in the groove adapted to contact with the trolleywire.

5. A trolley-wheel comprising a body composed of symmetrical circular plates detachably connected, the periphery of the body having a groove, and yielding means in the groove adapted to contact with the trolleywire.

6. A trolley-wheel comprising a circular body having a grooved periphery, a ring in the groove adapted to contact with the trolleywire and a spiral spring around the groove supporting said ring.

7. A trolley-wheel comprising a body com posed of two symmetrical circular plates, the body having a peripheral groove, means in the groove adapted to contact with the trolleywirc, and a spiral spring circling the groove and supporting said means.

8. A trolley-wheel comprising a body composed of two symmetrical circular plates detachably connected, the body having a pcripheral groove, means in the groove adapted to contact with the trolley-wire, and a spiral spring circling the groove and supporting said means.

9. A trolley-wheel comprising a body composed of two symmetrical circular plates, the body having a peripheral groove, means in the groove adapted to contact with the trolleywire, and a spiral spring circling the groove and supporting said means, and bolts connecting the two plates together.

10. In combination with a trolley wheel shaft, a pole-cap having a flared portion which is slotted, and a pair of flat springs supporting opposite ends of the shaft with their ends lying in the slot.

11. In combination with a trolley wheel shaft, a pole-cap having a flared portion which is slotted, and a pair of flat springs supporting opposite ends of the shaft with their ends lying in the slot, and belts in the flared portion holding the springs in place.

12. In combination with a trolley wheel shaft, a pole-cap having a flared portion which is slotted, and a pair of flat springs supporting opposite ends of the shaft with their ends lying in the slot, the ends of the springs being curved around the shaft.

In testimony whereof I have signed my name to this spcciflcation,in the presence of two subscribing witnesses, at Los Angeles, in the county of Los Angelcs and State of California, this 20th day of April, 1903.

JOHN SMITH BRIGGS.

\Vitnesses:

T. HAoKLnY, JULIA TOWNSEND. 

